The grade of the magnetic concentrate was determined using wet chemical analysis. XRD and Microscopic studies were carried out in order to analyze the conversion of hematite into magnetite through phase transformation on roasted and magnetic separation concentrate.

This test used countercurrent bubble contact flotation column in reverse flotation to improve the grade of magnetic concentrate. By the tests of operating conditions and reagent system experiment ...

In this study, mixed magnetic concentrate in scene was beneficiated by stepped-flotation, in which siderite was separated in first direct flotation step to eliminate its negative influence on hematite flotation, and then the high quality hematite concentrate could be obtained by second reverse flotation step.

The reverse flotation dephosphorization tests on real spodumene concentrate were carried out by an XFD IV flotation machine with a 0.5 L cell. In each test, 100 g of real spodumene concentrate was added to the flotation cell. Fig. 2 b shows the flotation flow chart of real spodumene concentrate.

,：1500、10%、60 g/t、0.10%。. This paper takes the fine-grained hematite concentrate as the research object. In order to explore the serious overflow loss of the thickening ...

Therefore, there have been many attempts for the production of pellet grade concentrate from low-grade BHQ ores using conventional mineral processing techniques. Magnetic separation and flotation of BHQ ore could enrich the feed with 39% Fe to a concentrate having 65.3% Fe at 61.9% iron recovery [11].

On the other hand, direct flotation as an alternative route led to a partial flotation of quartz and in consequence reduced the grade of the final concentrate 10.

The traditional hematite depressant starch has the disadvantages of poor solubility and high viscosity. In this study, a novel hematite depressant, pullulan, with better performance and flotation effect than starch was found. The structure, molecular weight and viscosity of pullulan were determined for its characterization. The results of flotation …

Micro-flotation results showed that curdlan was used as an effective depressant for quartz-hematite reverse flotation separation. In artificial mixed ore tests, at pH 11.5 and concentration of curdlan 20 mg/L, the grade of iron concentrate was improved to 65.03% with recovery of 90.03%.

Thus, the control of reverse cationic flotation is problematic and can negatively affect the grade and recovery of the concentrate. Investigating the factors affecting froth stability in hematite flotation systems is of great importance to improve the flotation performance and optimize the subsequent dewatering process.

Request PDF | Selective Separation of Hematite by a Synthesized Depressant in Various Scales of Anionic Reverse Flotation | Demand for high-quality iron concentrate is significantly increasing ...

The hematite stage grinding and magnetic-separation-flotation process has the advantages of fully expressing low-cost magnetic separation advantages, selecting qualified concentrate with grade higher than 65% through a magnetic separation method, reducing amount of ore needing flotation, ensuring high-grade final concentrate with the grade ...

Although flotation technique is a well established industrial practice for the separation of mineral values, limited investigations have been made on low grade Indian banded iron ores. Das et al. [9] carried out magnetic and flotation studies of Indian banded hematite quartzite (BHQ) ore for the production of pellet grade concentrate.

The effect of sodium polyacrylate (PAAS) on the flotation separation of fine hematite from quartz and its mechanism were investigated by micro-flotation experiments using NaOL as a collector, particle size analysis, zeta potential measurements, FT-IR, SEM analysis as well as XPS analyses.

Hematite positive flotation process is featured with simple dosage, low processing cost, which is especially suitable for a single hematite. However, the qualified hematite concentrate can only be ...

The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier transform infrared spectroscopy. The flotation results show that interactions between siderite and quartz are the main reasons that siderite significantly influences the floatability. The interactions are attributed to dissolved …

The hydrophobic flocs produced with sodium oleate were found to be readily recoverable by flotation. Rougher flotation recoveries of 94% were achieved to a concentrate grade of 46% Fe from a mixed hematite/quartz feed containing 15% Fe.

The flotation process is widely used to beneficiate the Anshan type of hematite in China but the concentrate iron recovery and grade are often not satisfactory.

The adhesion behavior between particles in the pulp will seriously affect the index of concentrate. In this paper, the effect of citric acid on chlorite in hematite reverse flotation system was studied. The flotation test and settlement test of artificial mixed ore showed that a lower dosage of citric acid could significantly improve the removal rate of …

The flotation of rare earth oxides (REO) in monazite from mixtures containing monazite, hematite, and quartz with hydroxamic acid as a collector has been investigated using an IMN microflotation cell and a 1.2 L Denver flotation cell. Maximum flotation recovery of both monazite and hematite was attained at pH 7, whereas that of …

In this study, ultrasonic treatment was introduced to enhance the depressive performance of starch in the reverse flotation separation of fine hematite from quartz. It was found that after ultrasonic treatment, starch was not only able to impart a higher surface wettability of hematite, but also bet …

Yang et al. [12] attempted to inhibit hematite floatability with corn starch, aiming to disclose the effect of starch solubility on the flocculation-flotation separation of quartz and hematite ...

Using high-performance depressants is critical for effective iron ore reverse flotation because the inefficient depression of hematite leads to the loss of iron to the froth and the unselective depression of silicates results in a concentrate of low-grade iron.

Water pH is most important factor in selective flocculation-dispersion of hematite. Limestone/dolomite flux dissolves at neutral pH. Water hardness increases significantly upon the addition of flux. Soluble iron is removed during flotation process by cationic exchange or oxidation.

Furthermore, a comparison test between the regular flotation and electroflotation was conducted in the reverse flotation of magnetic separation concentrate. Compared with the regular flotation process, electroflotation flotation was characterized by simple reagent regime (without pH regulator and activator) and …

The cation reverse flotation is a widely used method in improving the grade of iron ore concentrate, but hematite depressant is the key. In this work, the flotation behavior of hematite and quartz using the complex of Fe (III) and xanthan gum (Fe (III)-XG) as depressant was investigated via micro-flotation tests.

The objective of this study is to explore the improved flotation separation of chlorite from hematite by sodium alginate, with particular attention to the changes in the liquid-carrying capacity of the bubbles and stability before and after the addition of sodium alginate during hematite reverse flotation.

The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier transform infrared spectroscopy. The flotation results show that interactions between siderite and quartz are the main reasons that siderite significantly influences the floatability. The interactions are attributed to …

Micro-flotation test results illustrated that all the examined depressants could depress hematite in the presence of an anionic collector.

The adhesion behavior between particles in the pulp will seriously affect the index of concentrate. In this paper, the effect of citric acid on chlorite in hematite reverse flotation system was ...